Are the inputs of the xS series drives optoisolated?
Yes, all the drives belonging to the OS, LS and DS series have the digital input optoisolated, even in the cheaper versions.
LAM Technologies has always given much attention to the reliability of its products and to this purpose makes use of high quality optocouplers in all the panel products. This ensures noise immunity and grants a reliable functioning over the time.
The use of products without insulation on the digital inputs represents a great risk and should be avoided in all the industrial application of quality.